Protective high-voltage direct-current contactor

Abstract

The utility model discloses a protective high-voltage direct current contactor, which comprises a contactor main body and an end cover arranged on the contactor main body, a protective cover used for covering the top of the contactor main body is arranged on the end cover, and the protective cover is arranged on the end cover in a turnover manner through a hinge structure; the hinge structure comprises a hinge seat arranged at one end of the top of the end cover and a hinge shaft arranged at one end of the bottom of the protective cover, the hinge shaft is rotatably connected with the hinge seat, a clamping seat is arranged at the other end of the top of the end cover, and a buckle structure corresponding to the clamping seat is arranged at the bottom of the protective cover and matched with the clamping seat. And when the protective cover covers the top of the contactor main body, the protective cover is buckled and fixed with the end cover. According to the utility model, the protective cover which can be opened and closed is arranged on the end cover of the contactor main body, so that not only can the contact be protected, but also electrical elements can be conveniently mounted and dismounted, the structure is simple, and the connection mode is reliable and stable.

Description

Technical Field

[0001] This utility model relates to the field of contactor technology, specifically to a protective high-voltage DC contactor. Background Technology

[0002] High-voltage DC contactors are mainly classified into ceramic-sealed gas-filled type, plastic-encapsulated open type, and epoxy-sealed gas-filled type. Among them, the epoxy-sealed gas-filled type high-voltage DC contactor uses a plastic shell arc-extinguishing chamber, which is sealed by epoxy resin potting process. The internal inert gas is filled to extinguish the arc and protect the contacts. Since the main contacts need to be exposed to install copper busbars, there is a risk of foreign objects falling into the contact points, resulting in poor contact of the product and certain safety hazards. Summary of the Invention

[0003] To overcome the above-mentioned defects, this utility model provides a protective high-voltage DC contactor to solve the problem of foreign objects contacting the contacts.

[0004] The technical solution adopted by this utility model to solve its technical problem is: to provide a protective high voltage DC contactor, including a contactor body, an end cover provided on the contactor body, and a protective cover provided on the end cover for covering the top of the contactor body. The protective cover is rotatably provided on the end cover through a hinge structure.

[0005] The hinge structure includes a hinge seat located at one top end of the end cap and a hinge shaft located at one bottom end of the protective cover. The hinge shaft and the hinge seat are rotatably connected.

[0006] The other end of the top of the end cap is provided with a retaining seat, and the bottom of the protective cover is provided with a buckle structure corresponding to the retaining seat. The buckle structure cooperates with the retaining seat to fasten and fix the end cap when the protective cover covers the top of the contactor body.

[0007] As a further improvement of this utility model, the hinge seat and the card seat are respectively disposed at both ends of the insulating partition on the end cover along the length direction; the hinge seat is provided with a U-shaped hinge groove with an opening facing away from the card seat along the vertical direction, and hinge holes are respectively provided at the upper ends of the inner walls on both sides opposite to the hinge groove.

[0008] The protective cover includes a cover body, a protrusion located at the bottom of one end of the cover body that mates with the hinge groove, and a hinge shaft located on the protrusion and rotatably connected to the hinge hole.

[0009] As a further improvement of this utility model, the hinge shaft is disposed near the inner wall of the boss, and the bottom of the boss is provided with a stop portion that is inclined downward and disposed toward the groove opening of the hinge groove.

[0010] The inner walls on both sides opposite to the hinge slot are respectively provided with guide portions that communicate with the hinge hole and extend to the outside of the slot. The guide portions are trumpet-shaped structures that gradually expand outward along the hinge hole, so that when the cover is flipped to a predetermined angle, the hinge shaft on the cover can disengage from the hinge seat along the guide portions.

[0011] As a further improvement of this utility model, the buckle structure is integrally formed on the cover body;

[0012] The snap-fit ​​structure includes:

[0013] The U-shaped body, which is arranged in the same direction as the protrusion, has two parallel sidewalls and an arc-shaped bottom connecting the two sidewalls to form an upward-opening U-shaped structure, wherein the top of one of the sidewalls near the protrusion is integrally connected to the cover through a bend.

[0014] The drive arm is located on the other side wall of the U-shaped body and extends upward toward the opening of the U-shaped body, protruding from the top end face of the cover. The bottom of the drive arm has a horizontally outward protruding buckle on the side facing the card seat, which is used to engage with the card seat.

[0015] As a further improvement of this utility model, the cover has a guide groove on one side of the buckle structure, the drive arm extends vertically through the guide groove to the outside of the cover, and can drive the buckle part on it to move away from the buckle seat under the action of external force.

[0016] The buckle structure has a clearance groove for avoiding the insulating partition. The clearance groove divides the buckle into two sections, and the two sections are symmetrically arranged on both sides of the insulating partition.

[0017] As a further improvement of this utility model, the card holder includes:

[0018] A limiting plate is integrally formed on the end cap and is perpendicularly connected to the insulating partition.

[0019] The device includes two locking parts, which are located on the limiting plate and correspond to the two buckle parts. Each locking part has a stop surface on the bottom side facing the buckle part that is adapted to the buckle part.

[0020] As a further improvement of this utility model, the top of each of the two blocking parts is provided with a limiting protrusion. When the protective cover is fastened to the end cover, the two limiting protrusions are placed in the guide groove.

[0021] As a further improvement of this utility model, the bottom of the cover is also integrally connected with an alignment structure, which is disposed between the hinge shaft and the snap-fit ​​structure, and includes:

[0022] The first alignment plate, there are two first alignment plates, and the two first alignment plates are respectively arranged on both sides of the width direction of the insulating partition;

[0023] The second alignment plate is connected to the two first alignment plates on the side facing the hinge axis;

[0024] The insulating partition has an alignment groove for inserting the second alignment plate.

[0025] As a further improvement of this utility model, the end cap is further provided with:

[0026] A protective cover is provided over the air injection hole of the end cap;

[0027] The mating holes are provided in two places, which are respectively arranged on both sides of the insulating partition to allow the two stationary contact leads of the contactor body to pass through.

[0028] The cover has an opening for avoiding the protective shield, and the bottom has an annular limiting part that matches the ends of the two stationary contact leads.

[0029] As a further improvement of this utility model, the bottom of the cover is provided with triangular reinforcing ribs on the opposite sides of the two first alignment plates.

[0030] The beneficial effects of this utility model are: by setting an openable protective cover on the end cover of the contactor body, not only can the contacts be protected, but the installation and disassembly of electrical components can also be facilitated. The structure is simple and the connection method is reliable and stable. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the protective cover of this utility model in the open state;

[0032] Figure 2 This is a schematic diagram of the protective cover of this utility model in the snap-fit ​​state.

[0033] Figure 3 This is a schematic diagram of the main structure of the contactor of this utility model;

[0034] Figure 4 This is a schematic diagram of the protective cover structure of this utility model;

[0035] Figure 5 This is a schematic diagram of the AA-direction cross-sectional structure of the protective cover of this utility model.

[0036] Referring to the accompanying drawings, the following explanations are provided:

[0037] 1. End cap; 101. Hinge seat; 1011. Hinge groove; 1012. Hinge hole;

[0038] 1013. Guide section; 102. Card holder; 1021. Limiting plate; 1022. Blocking section;

[0039] 10221, Stop surface; 1023, Limiting protrusion; 103, Insulating partition; 1031, Alignment groove; 104, Protective cover; 105, Mating hole; 2, Protective cover; 201, Hinge shaft; 2011, Thrust; 2012, Stop part; 202, Snap-fit ​​structure; 2021, U-shaped body; 20211, Side wall; 20212, Arc-shaped bottom; 20213, Bending part; 2022, Drive arm; 20221, Snap-fit ​​part; 2023, Clearance groove; 203, Cover; 2031, Guide groove; 2032, Clearance opening; 2033, Annular limiting part; 204, Alignment structure; 2041, First alignment plate; 2042, Second alignment plate; 205, Triangular reinforcing rib. Detailed Implementation

[0040] The preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

[0041] See Figures 1 to 5 This utility model provides a protective high-voltage DC contactor, including a contactor body, an end cover 1 disposed on the contactor body, a protective cover 2 for covering the top of the contactor body on the end cover 1, the protective cover 2 being hinged and rotatable on the end cover 1, the end cover 1 having an insulating partition 103, a protective cover 104, and mating holes 105, the insulating partition 103 being vertically disposed in the middle of the end cover 1, the two mating holes 105 being respectively arranged on both sides of the insulating partition 103 for the two stationary contact leads of the contactor body to pass through, that is, the insulating partition 103 being vertically disposed between the two stationary contact leads for electrical isolation of the two stationary contact leads, which are used for electrical connection with copper busbars. In addition, the end cover has an injection hole on one end near the length of the insulating partition 103 for injecting inert gas into the chamber inside the contactor body, the protective cover 104 being disposed on the injection hole for protection.

[0042] Note: The internal structure of the contactor body and the principle of electrical switching are the same as existing technologies, and will not be described in detail here.

[0043] The difference between this embodiment and the prior art is that a protective cover 2 is provided on the contactor body to prevent foreign objects from falling onto the contactor body and to ensure the stability of the electrical connection. In addition, the protective cover has a simple structure and is connected to the contactor body in an openable manner, which facilitates the connection and disassembly of electrical components.

[0044] Specifically, the end cap 1 is provided with a hinge seat 101 and a locking seat 102 at both ends of its insulating partition 103 along its length. Correspondingly, the protective cover 2 is provided with a hinge shaft 201 that cooperates with the hinge seat 101 to realize the rotation of the protective cover, and a snap-fit ​​structure 202 that cooperates with the locking seat 102 to realize the fixation of the protective cover.

[0045] The hinge seat 101 has a U-shaped hinge groove 1011 with an opening facing away from the card seat 102 along the vertical direction, and hinge holes 1012 are respectively opened on the upper ends of the inner walls on both sides opposite to the hinge groove 1011. The protective cover 2 includes a cover body 203. One end of the cover body 203 has a boss 2011 that mates with the hinge groove 1011. The hinge shaft 201 is located near the inner wall of the boss 2011. The bottom of the boss 2011 has a stop portion 2012 that is inclined downward and faces the opening of the hinge groove 1011. The inner walls of the two opposite sides of the hinge groove 1011 are also provided with guide portions 1013 that communicate with the hinge hole 1012 and extend to the outside of the groove. The guide portion 1013 is a trumpet-shaped structure that gradually expands radially outward along the hinge hole 1012, so that when the cover body 203 is flipped to a predetermined angle, the hinge shaft 201 on the cover body 203 can disengage from the hinge seat 101 along the guide portion 1013. In other words, when the protective cover 2 is flipped so that its upper stop part 2012 fits against the bottom of the hinge groove 1011, the protective cover is flipped to a predetermined angle. At this time, pulling the protective cover outward can separate the protective cover from the end cover, thus achieving quick disassembly of the protective cover. Conversely, pulling it outward can achieve quick installation of the protective cover.

[0046] Furthermore, the opposite ends of the hinge points of the protective cover and the end cap are fixed or opened by a snap-fit ​​mechanism. Specifically, the snap-fit ​​structure 202 is integrally formed on the cover body 203. The snap-fit ​​structure 202 includes a U-shaped body 2021 and a drive arm 2022. The U-shaped body 2021 is arranged in the same direction as the boss 2011 and has two parallel sidewalls 20211 and an arc-shaped bottom 20212 connecting the two sidewalls 20211 to form an upward-facing U-shaped structure, which gives the snap-fit ​​structure 202 a certain degree of elasticity. The sidewall 20211 closest to the boss 2011... The top of the cover 203 is integrally connected to the cover body 203 through the bending part 20213. The connection end adopts the bending part 20213 to reduce the connection stress and improve the service life of the buckle structure 202. The drive arm 2022 is set on the other side wall 20211 of the U-shaped body 2021 and extends upward towards the opening direction of the U-shaped body 2021, protruding from the top end face of the cover body 203. The bottom of the drive arm 2022 is provided with a horizontally outward protruding buckle part 20221 on the side facing the card seat 102, which is used to engage with the card seat 102 to realize the opening or fixing of the protective cover.

[0047] Furthermore, the cover 203 has a guide slot 2031 on one side of the latching structure 202. The drive arm 2022 extends vertically through the guide slot 2031 to the top of the cover 203 and can drive the latching part 20221 on it to move away from the latching seat 102 under the action of external force. The latching structure 202 has a clearance groove 2023 for avoiding the insulating partition 103. The clearance groove 2023 divides the latching part 20221 into two sections, and the two sections are symmetrically arranged on both sides of the insulating partition 103.

[0048] Correspondingly, the card holder 102 includes a limiting plate 1021, a card blocking part 1022, and a limiting protrusion 1023. The limiting plate 1021 is integrally formed on the end cover 1 and is vertically connected to the insulating partition 103 to form a "T" shaped structure. There are two card blocking parts 1022, which are located on the limiting plate 1021 and are correspondingly arranged with two latching parts 20221. Each card blocking part 1022 has a stop surface 10221 adapted to the latching part 20221 on the bottom side facing the latching part 20221. That is, the two card blocking parts 1022 are symmetrically arranged on the horizontal section of the "T" shape with the vertical section of the "T" shape as the axis of symmetry. The two limiting protrusions 1023 are respectively set on the top of the corresponding blocking part 1022. When the protective cover 2 is fastened to the end cover, the limiting protrusions are placed in the guide groove 2031 and on both sides of the insulating partition 103, so as to play the role of limiting and guiding, and facilitate the fastening of the protective cover.

[0049] With attachment Figure 5 For reference, the arrow on the right side of the drive arm 2022 points to the direction of the external force applied to the buckle structure. When the drive arm 2022 is moved to the left by the force, it drives the buckle part 20221 on it to move to the left simultaneously. At this time, the buckle part 20221 separates from the stop surface 10221 of the card seat. The buckle part 20221 loses its obstruction, and the protective cover can be flipped up counterclockwise to open. The stop part 2012 provided on the protrusion 2011 supports it at the set opening and closing angle. When the protective cover is flipped down clockwise and covers the top of the contactor body, the buckle part 20221 is reset by the rebound force of the U-shaped body 2021 to realize the buckling of the protective cover and the end cover. The structure is simple and the operation is convenient.

[0050] Furthermore, the bottom of the cover 203 is integrally connected to an alignment structure 204. The alignment structure 204 is located between the hinge shaft 201 and the snap-fit ​​structure 202. The alignment structure 204 includes two first alignment plates 2041 and a second alignment plate 2042 integrally connecting the two first alignment plates 2041, so that the alignment structure 204 forms a U-shaped structure. At the same time, the two first alignment plates 2041 are respectively located on both sides of the width direction of the insulating partition 103; and the insulating partition 103 has an alignment groove 1031 for the second alignment plate 2042 to be inserted. That is, during the process of the protective cover flipping and fastening to the end cover, the alignment structure 204 facilitates the precise alignment of the snap-fit ​​structure and the card seat, and at the same time prevents the protective cover from shaking in the horizontal direction after it is fixed, ensuring the stable fastening of the protective cover and the end cover.

[0051] Furthermore, the bottom of the cover 203 is provided with triangular reinforcing ribs 205 on the opposite sides of the two first alignment plates 2041 to enhance the stability of the alignment structure. The cover 203 is provided with a clearance opening 2032 for avoiding the protective cover 104, and the bottom is provided with an annular limiting part 2033 adapted to the ends of the two stationary contact leads.

[0052] In summary, the protective high-voltage DC contactor provided by this utility model, by setting an openable protective cover on the end cover of the contactor body, not only protects the contacts, but also facilitates the installation and disassembly of electrical components. It has a simple structure and a reliable and stable connection method.

[0053] Many specific details have been set forth in the above description to provide a full understanding of this utility model. However, the above description is only a preferred embodiment of this utility model, and this utility model can be implemented in many other ways different from those described herein. Therefore, this utility model is not limited to the specific embodiments disclosed above. Furthermore, any person skilled in the art can make many possible variations and modifications to the technical solution of this utility model using the methods and techniques disclosed above, or modify it into equivalent embodiments with equivalent changes, without departing from the scope of the technical solution of this utility model. Any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model, without departing from the content of the technical solution of this utility model, shall still fall within the protection scope of the technical solution of this utility model.

Claims

1. A protective high-voltage DC contactor, comprising a contactor body and an end cover (1) disposed on the contactor body, characterized in that: The end cap (1) is provided with a protective cover (2) for covering the top of the contact body. The protective cover (2) is rotatably mounted on the end cap (1) by means of a hinge structure. The hinge structure includes a hinge seat (101) at one top end of the end cap (1) and a hinge shaft (201) at one bottom end of the protective cover (2). The hinge shaft (201) and the hinge seat (101) are rotatably connected. The other end of the top of the end cap (1) is provided with a card seat (102), and the bottom of the protective cover (2) is provided with a buckle structure (202) corresponding to the card seat (102). The buckle structure (202) cooperates with the card seat (102) to be fastened and fixed to the end cap (1) when the protective cover (2) covers the top of the contactor body.

2. The protective high-voltage DC contactor according to claim 1, characterized in that: The hinge seat (101) and the card seat (102) are respectively disposed at both ends of the insulating partition (103) on the end cover (1) along the length direction; the hinge seat (101) is provided with a U-shaped hinge groove (1011) with the opening facing away from the card seat (102) along the vertical direction, and the upper ends of the inner walls on both sides of the hinge groove (1011) are respectively provided with hinge holes (1012); The protective cover (2) includes a cover body (203), a boss (2011) located at the bottom of one end of the cover body (203) and cooperating with the hinge groove (1011), and a hinge shaft (201) located on the boss (2011) and rotatably connected to the hinge hole (1012).

3. The protective high-voltage DC contactor according to claim 2, characterized in that: The hinge shaft (201) is disposed near the inner wall of the boss (2011), and the bottom of the boss (2011) is provided with a stop part (2012) that is inclined downward and faces the groove opening side of the hinge groove (1011). On the inner walls of the two opposite sides of the hinge groove (1011), guide portions (1013) are respectively provided, which communicate with the hinge hole (1012) and extend to the outside of the groove. The guide portion (1013) is a trumpet-shaped structure that gradually expands outward along the hinge hole (1012) so that when the cover (203) is flipped to a predetermined angle, the hinge shaft (201) on the cover (203) can be disengaged from the hinge seat (101) along the guide portion (1013).

4. The protective high-voltage DC contactor according to claim 3, characterized in that: The buckle structure (202) is integrally formed on the cover (203); The snap-fit ​​structure (202) includes: The U-shaped body (2021) is arranged in the same direction as the protrusion (2011), and has two parallel sidewalls (20211) and an arc-shaped bottom (20212) connecting the two sidewalls (20211) to form an upward-opening U-shaped structure, wherein the top of one of the sidewalls (20211) near the protrusion (2011) is integrally connected to the cover (203) through a bend (20213); The drive arm (2022) is disposed on the other side wall (20211) of the U-shaped body (2021) and extends upward toward the opening direction of the U-shaped body (2021) and protrudes from the top end face of the cover (203). The bottom of the drive arm (2022) is provided with a horizontally protruding buckle (20221) on the side facing the card seat (102) for engaging with the card seat (102).

5. The protective high-voltage DC contactor according to claim 4, characterized in that: The cover (203) has a guide slot (2031) on one side of the buckle structure (202). The drive arm (2022) extends vertically through the guide slot (2031) to the outside of the cover (203) and can drive the buckle part (20221) on it to move away from the buckle seat (102) under the action of external force. The buckle structure (202) has a clearance groove (2023) for avoiding the insulating partition (103). The clearance groove (2023) divides the buckle part (20221) into two sections, and the two sections are symmetrically arranged on both sides of the insulating partition (103).

6. The protective high-voltage DC contactor according to claim 5, characterized in that, The card holder (102) includes: Limiting plate (1021), the limiting plate (1021) is integrally formed on the end cap (1) and is vertically connected to the insulating partition (103); The device includes two locking parts (1022), which are located on the limiting plate (1021) and are correspondingly arranged with the two latching parts (20221). Each locking part (1022) has a stop surface (10221) on its bottom side facing the latching part (20221) that is adapted to the latching part (20221).

7. The protective high-voltage DC contactor according to claim 6, characterized in that: The top of each of the two retaining parts (1022) is provided with a limiting protrusion (1023). When the protective cover (2) is fastened to the end cover (1), the two limiting protrusions (1023) are placed in the guide groove (2031).

8. The protective high-voltage DC contactor according to claim 2, characterized in that: The bottom of the cover (203) is also integrally connected to an alignment structure (204), which is located between the hinge shaft (201) and the snap-fit ​​structure (202), and includes: The first alignment plate (2041) is provided in two, and the two first alignment plates (2041) are respectively provided on both sides of the width direction of the insulating partition (103); The second alignment plate (2042) is connected to the two first alignment plates (2041) on the side facing the hinge axis (201); The insulating partition (103) has an alignment groove (1031) for the second alignment plate (2042) to be inserted.

9. The protective high-voltage DC contactor according to claim 8, characterized in that, The end cap (1) is also provided with: A protective cover (104) is provided on the air injection hole of the end cap (1); Two mating holes (105) are provided, and the two mating holes (105) are respectively arranged on both sides of the insulating partition (103) so that the two stationary contact leads of the contactor body can pass through. The cover (203) has a clearance opening (2032) for avoiding the protective cover (104), and an annular limiting part (2033) at the bottom that is adapted to the ends of the two stationary contact leads.

10. The protective high-voltage DC contactor according to claim 9, characterized in that: The bottom of the cover (203) is also provided with triangular reinforcing ribs (205) on the opposite side of the two first alignment plates (2041).

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